Interference analysis and mitigation for digital wireless communication systems

成熟的无线通信系统的性能受到衰落和干扰的限制。这些限制包括语音和数据服务质量下降、频繁掉话以及服务提供商可容纳的用户数量较少。衰落是由无线电信号的多径传播引起的。干扰是由多个无线用户占用同一信道或通信系统中不完善的收发机设计引起的。衰落和干扰的缓解将改善无线服务的质量并增加用户容量。因此，衰落环境下的干扰研究是一个重要的研究课题。本研究旨在探讨宽频无线通讯系统在衰落环境下的干扰分析与抑制。本文的研究主要集中在以下三个方面：（1）在衰落和干扰条件下，实际调制方案的渐近误码率性能分析。(2)无线应用中能够减轻干扰的接近最佳实用接收机的开发。(3)为下一代无线网络开发能够减轻干扰的鲁棒数据检测方案。期望能更好更深入地了解干扰在衰落环境中的作用，从而改进无线通信收发器的设计。这种改进的设计将允许服务提供商向更多用户提供可靠且负担得起的高数据速率无线服务。

Performances of mature wireless communication systems are limited by fading and interference. These limitations are degraded voice and data services, frequent call drops, and smaller number of users that service providers can accommodate. Fading is caused by multipath propagation of radio signals. Interference is caused by multiple wireless users occupying on the same channel or by imperfect transceiver design in communication systems. Mitigation of fading and interference will improve the quality of wireless services and increase the user capacity. Therefore interference study in fading environment is an important research topic. This research proposal addresses the analysis and mitigation of interference in fading environment for broadband wireless communication systems. The study will focus on the following three areas: (1) Asymptotic error rate performance analysis of practical modulation schemes in fading and interference. (2) Development of near-optimal practical receiver capable of interference mitigation for wireless applications. (3) Development of robust data detection scheme capable of interference mitigation for the next generation wireless networks. We expect to obtain better and deeper understanding of the role of interference in fading environment so that we can improve the design of wireless communication transceivers. Such improved design will allow service providers to provide more users with reliable and affordable high data rate wireless services.